Renormalization group flows in one-dimensional lattice models: Impurity scaling, umklapp scattering, and the orthogonality catastrophe
نویسندگان
چکیده
منابع مشابه
Effect of finite impurity mass on the Anderson orthogonality catastrophe in one dimension.
A one-dimensional tight-binding Hamiltonian describes the evolution of a single impurity interacting locally with N electrons. The impurity spectral function has a power-law singularity A(ω) ∝| ω− ω0 |−1+β with the same exponent β that characterizes the logarithmic decay of the quasiparticle weight Z with the number of electrons N , Z ∝ N−β. The exponent β is computed by (1) perturbation theory...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2014
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.90.155129